Took off from Luqa, Malta on a bombing mission to Argostoli Harbor, Greece.
Shot down into the sea by enemy aircraft, no survivors.
Killed includes Calderwood:Flight Sergeant Albert Perry McLean RCAF R/70457 KIA Phaleron War Cemetery, Greece, Plot 21. Row B. Grave 4.Sergeant Ronald Davidson Gracie RAF pilot KIA Phaleron War Cemetery, Lt Ellis Edward Chetwynd Talbot GC, MBE Royal Engineers KIA whilst acting as a liaison officer to the RAF on Malta, Phaleron War Cemetery, Greece.
Flight Sergeant Calderwood had been slightly injured on 1941-06-18 in a 17 OTU aircraft accident at Evesham, Pershore, Worcester, England.